| 2000-2016年新疆伊犁河谷草地NDVI变化趋势分析 |
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| 引用本文： | 闫俊杰,张静,雷雨,沙吾丽&#,达吾提拜,吕光辉. 2000-2016年新疆伊犁河谷草地NDVI变化趋势分析[J]. 草地学报, 2018, 26(4): 859-868. DOI: 10.11733/j.issn.1007-0435.2018.04.010 |
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| 作者姓名： | 闫俊杰 张静 雷雨 沙吾丽&# 达吾提拜 吕光辉 |
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| 作者单位： | 1. 新疆大学资源与环境科学学院, 新疆 乌鲁木齐 830046;2. 中国科学院新疆生态与地理研究所, 新疆 乌鲁木齐 835000;3. 中国科学院大学, 北京 100049;4. 伊犁师范学院生物与地理科学学院, 新疆 伊宁 835000;5. 新疆水利厅, 新疆 乌鲁木齐, 830000 |
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| 基金项目： | 国家自然科学基金项目（31360101）资助 |
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| 摘 要： | 草地是伊犁河谷生态系统的主要组成，为探明其植被覆盖的变化特征，选用2000-2016年MODIS NDVI时间序列数据，应用Mann-Kendall检验、Theil-Sen Median趋势分析及R/S分析，对伊犁河谷近17年草地NDVI变化趋势进行分析。结果表明：2000-2016年伊犁河谷草地NDVI总体呈显著下降趋势，空间上88.07%草地NDVI出现下降，其中49.62%达到显著水平；各草地类型中，山地草甸NDVI平均值最高，面积最广，NDVI平均降低速率最高，其95.76%面积的NDVI出现下降，且73.10%达到显著水平；伊犁河谷97.77%草地NDVI变化趋势呈现正持续性，未来一定时期内绝大部分草地的NDVI仍将继续下降；与气温相比，伊犁河谷降水的年际变化与草地NDVI年变化的相关性更高。
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| 关 键 词： | 草地覆盖变化 MODIS NDVI 趋势检验 Hurst指数 伊犁河谷 |
| 收稿时间： | 2018-04-13 |
Analysis of the Changing Trend of Grassland NDVI in the Ili Valley of Xinjiang during 2000-2016 |
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| YAN Jun-jie,ZHANG Jing,LEI Yu,SHAWULI,#,Davutiba,LV Guang-hui. Analysis of the Changing Trend of Grassland NDVI in the Ili Valley of Xinjiang during 2000-2016[J]. Acta Agrestia Sinica, 2018, 26(4): 859-868. DOI: 10.11733/j.issn.1007-0435.2018.04.010 |
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| Authors: | YAN Jun-jie ZHANG Jing LEI Yu SHAWULI&# Davutiba LV Guang-hui |
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| Affiliation: | 1. College of Resources and Environment Science, Xinjiang University, Urumqi, Xinjiang 830046, China;2. Xinjiang Institute of Ecology and Geography, CAS, Urumqi, Xinjiang 830011, China;3. University of Chinese Academy of Science, Beijing 100049, China;4. College of Biology and Geography, Yili Normal University, Yining, Xinjiang 835000, China;5. Water Resources Department of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang 830000, China |
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| Abstract: | This paper intended to find out the characteristics of the vegetation cover changes in the grassland of Ili Valley,where the grassland is the main component of the ecosystem. Based on MODIS NDVI time series data during 2000-2016 and the methods of Mann-Kendall test,Theil-Sen Median trend analysis and R/S analysis,the changing trend of grassland NDVI in Ili Valley during the last 17 years was analyzed. The results showed:During 2000-2016,the NDVI of the grassland in Ili Valley showed a significant decline trend in total,and NDVI of 88.07% area decreasing,of which 49.62% reached significant level. Among all the grassland types in Ili Valley,the mountain meadow has the largest area,the highest averaged NDVI value,and the highest averaged rate of NDVI reduction. The NDVI of its 95.76% area decreased,and 73.10% reached significant level. The NDVI changing trend of the 97.77% grassland in Ili Valley showed positive persistence,indicating that NDVI of the grassland would continue to decline for a certain period of time in the future in most part of Ili Valley. Compared to temperature,the inter-annual variation of precipitation was more closely correlated to the change of NDVI of grassland in Ili Valley. |
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| Keywords: | Change in Grassland Cover MODIS NDVI Trend test Hurst Index Ili Valley |
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